DE102010005852A1 - Device for reducing the impact stress of a conveyor belt - Google Patents

Abstract

The invention relates to a device (10) for reducing the impact stress on a conveyor belt at a loading or transfer point of a belt conveyor, with at least one impact pad (15) to be arranged at the loading or transfer point below the upper run of the conveyor belt and a support structure (11) carrying the impact pad , 12, 13). So that the impact energy of heavy and sharp-edged conveyed goods is dampened to a greater extent than is the case with conventional impact tables with impact elements made of solid rubber, the impact cushion (15) according to the invention has at least one liquid-filled hollow chamber, the elasticity of the impact cushion (15) and the Liquid filling are matched or matched to one another in such a way that, when the impact cushion (15) is externally loaded, a reversible displacement of liquid takes place in the hollow chamber.

Description

The invention relates to a device for reducing the impact stress of a conveyor belt at a task or transfer point of a belt conveyor, with at least one to be arranged at the task or transfer point below the upper strand of the conveyor belt bump pad and a support cushion supporting support structure.

Such devices are known. For example, it is known to place at task points of belt conveyor systems, below the upper strand of the conveyor belt, so-called trough rollers with cushioning rings, which serve to reduce the impact stress of the belt upon impact of heavy or sharp-edged conveyed (see WBK-Bergberufsschulen Mountain Technology Learning Sheets, 5/81, Section 3.2. Conveying and transport in manhole and track, route support, sheet 4, picture 12 ).

Furthermore, so-called impact tables for feeding points of belt conveyor systems are known. They have a trough-shaped, formed from steel beams support structure, which is provided on the upper side with a plurality of strip-shaped, mutually parallel baffle elements (wear elements) made of rubber. The baffle elements (wearing elements) are provided on their upper side facing the underside of the upper run of the conveyor belt with a plastic coating, namely a polyethylene coating. Such baffle tables or wear elements are offered, for example, by the company Vulktrans Förder- und Verschleißschutzservice GmbH (cf. www.vulktrans.de ).

These known wear protection devices have basically proven in practice. However, the protective effect achievable with them is often unsatisfactory.

The present invention has for its object to provide a device of the type mentioned above, which absorbs the impact energy of heavy and sharp-edged feed material to a greater extent than is the case with conventional impact tables or upholstered ring rolls.

This object is achieved by a device having the features of claim 1.

The device according to the invention comprises at least one impact pad to be arranged at the feed point of a conveyor belt below the upper run of the conveyor belt and a support carrying the impact pad. According to the invention, the impact pad has at least one hollow chamber filled with liquid, wherein the elasticity of the impact pad and the liquid filling are coordinated or tunable to one another such that a reversible fluid displacement occurs within the hollow chamber when the impact pad is loaded externally.

The impact pad according to the invention is similar in principle to a waterbed. By the liquid-filled hollow chamber or hollow chambers an improved damping property of the baffle pad over conventional baffle tables or cushion ring rollers is achieved. The kinetic energy of the impacting material (transported material) is largely absorbed by the fluid damping. The wear of the conveyor belt is thereby significantly reduced. By the device according to the invention, the security against a breakdown of heavy or sharp conveyed material is significantly increased, especially in fall surrenders.

While it comes in the known impact tables with solid rubber impact strips not infrequently to a jump up of impacting rocks, which is undesirable, especially with respect to a Fördergutschonung or avoiding fines, the liquid damping invention prevents the jumping up of rocks. In particular, a higher conservation of the subsidized material, a stronger Feinstkornvermeidung and a stronger dust reduction are achieved by the device according to the invention.

An advantageous embodiment of the device according to the invention is characterized in that the at least one liquid-filled hollow chamber is divided by webs and / or partitions in sub-chambers. As a result, the damping behavior of the impact pad can be adjusted or adapted to different load cases. In this context, it is also advantageous if the webs and / or intermediate walls according to a further preferred embodiment of the invention have or limit passages for a fluid displacement of a sub-chamber in an adjacent sub-chamber. Through targeted dimensioning and systematic arrangement of the passages, the damping behavior of the impact pad can be varied within a wide range.

In order to adjust the damping behavior of the baffle cushion optionally at the location of the belt conveyor, the invention further provides, in a further embodiment, that the baffle pad is provided with at least one closable or self-closing opening for filling liquid in and / or draining liquid from the hollow chamber , This embodiment also makes it possible to remove the liquid from the impact pad for its transport and installation. At the installation site, the impact pad can then be filled with a suitable amount of liquid. The device according to the invention is therefore also distinguished by a relatively low mass to move and a simple installation.

According to a further preferred embodiment of the invention it is provided that the impact pad has a plurality of liquid-filled, hydraulically separated from each other hollow chambers. This embodiment also allows a targeted adjustment of the damping behavior of the impact pad. In addition, the functional reliability of the impact pad according to the invention is increased with respect to a possible leak in only one liquid-filled hollow chamber by this configuration.

The liquid filled in the impact pad or its hollow chamber (s) according to the invention consists of at least one liquid which may have different flow properties. In the present context, the term "liquid" in particular water, oils, gels and emulsions understood. The liquid filled in the impact pad or its hollow chamber (s) according to the invention can thus be designed in particular to be low-viscous, viscous, highly viscous or gel-like. In particular, the invention provides that in embodiments in which the impact pad has a plurality of separate hollow chambers, the hollow chambers are filled with different liquids, wherein the liquids differ in particular with regard to their viscosity.

The hollow chamber or hollow chambers of the baffle pad are preferably formed from at least one tube. Suitable hoses are available inexpensively in different sizes and can be arranged in different configurations in the impact pad, in particular pour, lather or vulcanize.

A further advantageous embodiment of the device according to the invention is that the impact pad is provided on its upper side with one or more wear bands. The at least one wear band consists for example of a plastic with high abrasion resistance and serves to protect the liquid-filled hollow chamber or hollow chambers against material breakdown. A worn or damaged wear band can be repaired by appropriate material application, for example by gluing or build-up welding. Preferably, however, the at least one wear band is releasably attached to the impact pad, so that it can be replaced if necessary against a new wear band.

Further preferred and advantageous embodiments of the device according to the invention are specified in the subclaims. The invention will be explained in more detail with reference to a drawing illustrating several embodiments. In a schematic representation:

1 a transfer station of a belt conveyor with a liquid-filled impact pad having inventive device, in perspective view;

2 a baffle table according to the invention, in perspective view;

3 the baffle of the 2 in an end view;

4 a baffle according to 2 in a cross-sectional view;

5 a baffle according to 2 in plan view;

6 another baffle according to the invention, in a cross-sectional view;

7 another baffle according to the invention, in a cross-sectional view; and

8th another baffle according to the invention, in a cross-sectional view.

In 1 is a transfer station 1 a belt conveyor shown. The transfer station 1 is designed as a fall passing and includes a transfer funnel 2 , in the on an upstream belt conveyor 3 abandoned conveyed material is dropped. The conveyed (not shown) falls through the funnel 2 on the downstream belt conveyor 4 , The top of the top run 5 of the belt conveyor 4 is over a certain length with dust cover 6 Mistake.

The endless conveyor belt 7 is about a reversing drum 8th from the lower reaches to the upper reaches (upper run) 5 directed. The reverse drum 8th is stored in a guyed frame (not shown). The conveyor belt lies in the upper and lower run 7 on rollers 9 , The roles 9 are stored in roller blocks (not shown), which in turn are mounted in a support frame (not shown). The roller blocks of the upper reaches 5 usually carry three roles 9 which are arranged trough-shaped.

Below the transfer funnel 2 , below the upper strand 5 of the conveyor belt 7 is a baffle table 10 arranged. The baffle table 10 Based on a girder construction consisting of several cross members 11 and a trough-shaped sheet metal 12 or a plurality of trough-shaped longitudinal members is formed. The trough-shaped sheet metal 12 or the side members are over support elements 13 , preferably in the form of support plates, with the cross members 11 connected.

In the hollow 14 The support structure is an impact pad 15 inserted. The length of the impact pad 15 essentially corresponds to the length of the trough 14 , The width of the bump pad 15 is preferably slightly larger than the width of the hollowed conveyor belt 7 ,

The impact pad 15 has according to the invention at least one liquid-filled hollow chamber. The elasticity of the impact pad 15 and the liquid filling are coordinated or tunable so that when external loading of the impact pad 15 a reversible fluid displacement takes place within the hollow chamber. This can be ensured in particular by setting a suitable liquid filling. The baffle table according to the invention 10 thus offers a shock absorption according to the principle of a waterbed. When in the bump pad 15 filled liquid is, for example, water, oil, gel and / or an emulsion. The water preferably contains antifreeze.

The impact pad 15 preferably has a plurality of hollow chambers, which are filled with the same liquid or different liquids or can be filled. The impact pad 15 is this with one or more closable or self-closing openings 16 for filling or draining liquid into or out of the respective hollow chamber. The openings 16 For example, consist of molded nozzles, each having a check valve and / or a screw cap 17 exhibit.

If, according to an advantageous embodiment, the impact pad according to the invention comprises a plurality of separate hollow chambers and each of the hollow chambers or different groups of the hollow chambers each having an opening 16 are provided, it is a further embodiment of the device according to the invention is to connect at least two of the openings via a line and / or to connect to a surge tank, in particular a storage bubble. This embodiment corresponds practically to a communicating tube system.

On its top is the bump pad 15 with one or more wear bands 18 Mistake. The wear bands 18 extend substantially over the entire length of the impact pad 15 and are, for example, directly vulcanized. They are made for example of polyethylene, polyamide or polyurethane. Alternatively it is provided that on the top of the baffle pad 15 Connecting elements (not shown) for releasably attaching the wear bands 18 vulcanized. For this purpose, the connecting elements have for example latching means and / or undercuts which are connected to the wear belts 18 trained locking means and / or undercuts cooperate.

In the in 4 illustrated embodiment is the impact pad 15 of the baffle table 10 ' from a closed, pillow-like shell or sheath 19 formed, which is made of rubber-elastic material. The sheath or sheath 19 contains several vulcanised hoses 20 , which serve as hollow chambers. The hoses filled with liquid 20 have substantially the same diameter with each other and are radially spaced from each other. The respective hose 20 stands both with the upper shell section 19.1 as well as with the lower shell section 19.2 touching.

In the in 5 The embodiment shown is the impact pad 15 again from a closed, pillow-like shell or sheath 19 formed, which is made of rubber or the like. In the sheath or sheath 19 of the impact pad 15 is a continuous hose 21 vulcanized, the meandering is arranged. The hose 21 It is also made of rubber and filled with water or another liquid. He stands with the upper shell portion and the lower shell portion of the jacket 19 touching in connection (cf. 4 ). It can also be seen that the elongated sections 21.1 of the hose 21 essentially over the entire length of the impact table 10 '' extend, and that the arcuate ends 21.2 of the hose 21 at the transverse ends (front sides) of the baffle table 10 '' are arranged. The elongated tube sections 21.1 are spaced apart. The gap 26 is preferably filled with flexible, tough material, such as rubber or foam. The hardness of this filling material is for example in a range of about 40 to 55 Shore A, preferably in the range of 45 to 50 Shore A.

The impact pad 15 of in 6 illustrated impact table 10 ''' has a shell or sheath 19 rubber or other elastomer. In the case or sheath 19 are several layers of tubing 22 arranged. The tubes 22 are preferably in the shell or casing 19 poured, foamed or vulcanized. In the example, three layers are shown. The hoses filled with liquid 22 have a relatively small diameter. They are packed tightly together. They can - as shown - have substantially the same diameter or different diameters (see. 8th ).

In the in 7 illustrated embodiment contains the liquid-filled pad 15 of the baffle table 10 '''' a hollow chamber through vulcanized webs or partitions 23 in sub-chambers 24 is divided. The bridges 23 extend from the lower shell portion 19.2 to the upper shell section 19.1 the rubber cover made of rubber 19 , The bridges or partitions 23 include or limit passages 25 , which is a fluid transfer from a sub-chamber 24 in an adjacent sub-chamber 24 enable.

This in 8th illustrated embodiment differs from the example in 4 in that between the hoses 20 , which have a relatively large diameter, more hoses 20.1 . 20.2 are arranged with a smaller diameter. The tubes 20.1 . 20.2 have different diameters. The hose 20.1 with the smallest diameter is essentially centered between the upper and lower tubes 20.2 as well as the hoses 20 arranged. The support structure 11 . 12 . 13 of the impact table 10 ° corresponds to the version according to 2 ,

The embodiment of the invention is not limited to the embodiments described above and shown in the drawing. Rather, numerous variants are possible, which make use of the invention specified in the appended claims, even with a different design.

LIST OF REFERENCE NUMBERS

1

Transfer station

2

Transfer hopper

3

Belt conveyors

4

Belt conveyors

5

Upper run (upper run)

6

Dust Capsule

7

conveyor belt

8th

reversing drum

9

role

10

impact table

10 '

impact table

10 ''

impact table

10 '' '

impact table

10 '' ''

Bounce table bounce table

11

crossbeam

12

trough-shaped sheet metal

13

Support element (support plate)

14

trough

15

plump cushions

16

Opening / grommet

17

screw

18

wear band

19

Sheath / jacket

19.1

upper jacket section

19.2

lower shell section

20

tube

20.1

tube

20.2

tube

21

tube

22

tube

23

Footbridge / partition wall

24

member chamber

25

passage

26

gap

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• WBK-Bergberufsschulen Mountain Technology Learning Sheets, 5/81, Section 3.2. Conveying and transport in manhole and track, distance conveying, sheet 4, picture 12 [0002]
• www.vulktrans.de [0003]

Claims (12)

Device for reducing the impact stress of a conveyor belt ( 7 ) at a task or transfer point of a belt conveyor, with at least one at the task or transfer point below the upper strand ( 5 ) of the conveyor belt ( 7 ) to be arranged impact pad ( 15 ) and one the impact pad ( 15 ) supporting support structure ( 11 . 12 . 13 ), characterized in that the impact pad ( 15 ) has at least one liquid-filled hollow chamber, wherein the elasticity of the impact pad ( 15 ) and the liquid filling are so coordinated or tunable that when external loading of the impact pad ( 15 ) a reversible fluid displacement takes place in the hollow chamber. Apparatus according to claim 1, characterized in that the hollow chamber by webs and / or partitions ( 23 ) in sub-chambers ( 24 ) is divided. Apparatus according to claim 2, characterized in that the webs and / or partitions ( 23 ) Passages ( 25 ) for a fluid displacement of a partial chamber ( 24 ) in an adjacent sub-chamber ( 24 ) or limit. Device according to one of claims 1 to 3, characterized in that the impact pad ( 15 ) has a plurality of liquid-filled hollow chambers. Device according to one of claims 1 to 4, characterized in that the hollow chamber or hollow chambers of at least one hose ( 20 . 21 . 22 ) is / are formed. Device according to claim 5, characterized in that the hose ( 21 ) is arranged meandering. Device according to one of claims 1 to 6, characterized in that the impact pad ( 15 ) a jacket made of rubber-elastic material ( 19 ) into which the at least one hollow chamber ( 20 . 21 ), foamed or vulcanized. Apparatus according to claim 7, characterized in that the sheath ( 19 ) an upper shell portion ( 19.1 ) and a lower shell portion ( 19.2 ), wherein the respective interposed hose ( 20 . 21 ) with both the upper shell portion ( 19.1 ) as well as with the lower shell section ( 19.2 ) touchingly. Apparatus according to claim 7, characterized in that in the sheath several layers of hoses ( 22 ) are arranged, cast in, foamed or vulcanized. Device according to one of claims 1 to 9, characterized in that the impact pad ( 15 ) on its upper side with one or more wear bands ( 18 ) is provided. Device according to one of claims 1 to 10, characterized in that the impact pad ( 15 ) with at least one closable or self-closing opening ( 16 ) is provided for filling liquid in and / or discharging liquid from the hollow chamber. Device according to one of claims 1 to 11, characterized in that as liquid in the impact pad ( 15 ) Water, oil, gel and / or an emulsion is filled.

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